The wanderer is the unit which I used when expanding, as this 'hunter'. Though it comes a bit late. Maybe you could put it a tech or two earlier.
As for the city conquest, you could do it this way (jus a suggestion). Leave out the special ''conquer city'' units and special Conquest rules.
And then, for the real Fallout scenario, when you have the time - simply take a big Western US map and let the game start with a capitol for each civ. In that capitol put 2,3 immobile 'Town Defence' or ''HQ'' Units with good stats. (not too high states and not producable by player).
In that way there will be no early rushes for the Capitol cities, the game will last longer and you setup a good ''historical'' position for the game (they shouldn't be close).
For the other maps simply leave out the Capture City Units and let the game play without them.
Also another thing I've noticed: there are no naval units. I think you can simply take some ironclad unit from vanilla civ4, rename it to post war destroyer and it's done. Same thing with transport and a work boat. You don't need any new techs, put them in some existing mid game techs.
Also, please make one visible and clear place with the download link of the latest version (and with the date clearly stated).
I feel like half of these mods here are updated but aren't properly ''advertised'', so newcomers could be confused. I am never sure did I get the latest version (I speak in general for the whole civfanatics forum).
For example, I am not sure is the latest version of this mod
here on the first post.